Quote Originally Posted by lowslowbenz View Post
So which would be a better radiator given the case above? Aluminum core or copper core
In this situation a copper/brass radiator would be better as it would be more resistant to corrosion.

But you need to understand all these issues are conditional. As long as you don't have any stray voltage running through the engine and as long as your coolant chemistry is relatively neutral you'll be fine with an aluminum radiator.